I use that exact landorus set just with life orb.
Smack downs great for predicted rotom switches.
Also consider naive as it needs the def so it can take less damage from pokemon like terrakions close combat.
Its not suviving any special ice or water attack anyway.

There is only one thing we can do: Create the Trio of Sand, a top class crime fighting force (or Pokemon battlers, whichever one fits the current situation. This is copy-pasted from a word document of seven years ago.) :D